Press Release

Close the Door Campaign: New research proves closing a shop door in winter saves up to 50% in energy usage and carbon emissions

New research from Cambridge University proves exactly how much energy is wasted by shops leaving their doors open with the heating on.

The research found that closing a shop door when heating is being used:

Reduces energy usage by up to 50%

Cuts a shop’s annual CO₂emissions by up to 10 tonnes of CO₂, equivalent to 3 return London to Hong Kong flights

Assists with mandatory national 34% reduction in carbon emissions

Enhances comfort of staff and customers, maintaining temperature at Chartered Institution of Building Services Engineers (CIBSE) recommended levels all day, even when outside temperature plummets

Maintains energy use at a consistent low level

Enables heating to be shut off long before the end of the day without affecting internal temperatures

Stops need for so-called “air curtains” over the door – among the greatest wasters of energy: a single one consumes 24 kWh per day. This is equivalent to emitting 91 kg CO₂per week, or more emissions than a return Glasgow to London coach trip

Jeannie Dawkins, Director, Close the Door Campaign, commented, “Here is the proof that it’s time for retailers to acknowledge the massive contribution they are making to energy waste and carbon emissions if they heat the street. By simply closing the shop door, CO₂ emissions dramatically decrease, energy bills are reduced, and customers and staff are made more comfortable. It’s a no-brainer.”

About the study

The independent research, commissioned by Close the Door, was carried out by Murat Basarir of the Glass & Façade Technology Research Group of the Engineering Department at Cambridge University, over winter 2009/2010. See the full study at www.closethedoor.org.uk under Scientific evidence.

About the Close the Door campaign

The campaign originated in Cambridge and is now nationwide. In Cambridge initially 8 shops agreed to close their doors against energy waste; this number has now risen to over 300 of all types and sizes. The campaign enjoys broad cross-party endorsement and has many high profile supporters.